2 layers31 × 38 mm
2 layers39 × 57 mm
Mb a
burgrp/retradio2Orange Pi Zero based web radio
- Size
- 39 × 57 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 22
- Pads
- 129
- Tracks, vias
- 257, 21
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 17 Oct 2018
- Updated
- 1 Jun 2025
Overview
Mb a is an open-source printed circuit board by burgrp, from the burgrp/retradio repository on GitHub. It is a 2-layer board of 39 × 57 mm with 35 parts on 22 nets, routed with 257 tracks and 21 vias.
It is built around the PAM8320RDR. Its parts include 19 capacitors, 7 resistors, 3 inductors, 2 ICs and 2 connectors.
Main components
1README
README.mdOrange Pi Zero based web radio
I2C peripherals
Rotary EncoderX
Addressing
- 0x40 NN Volume
- 0x41 AN Balance
- 0x42 BN Treble
- 0x43 NC Bass
- 0x44 AC Aperture
- 0x45 BC Tuning
- 0x46 ND Band
Push buttons
- 0x49 NN 7 Bands switch
Docker image
Start buildx builder
docker buildx create --name cross
docker buildx inspect --bootstrapBuild the image
docker run --rm --privileged docker/binfmt:820fdd95a9972a5308930a2bdfb8573dd4447ad3
docker buildx build --platform linux/arm/v7 . -t burgrp/retradio --pushDEVICE.FARM
OS installation
defa install device-id /dev/your-sd-card --wifi=ssid:password --ssh - --dto $PWD/mb-a/dto --root $PWD/mb-a/rootRetradio service installation
defa proxy device-id -- docker pull burgrp/retradio
defa proxy device-id -- docker-compose up -dor
./update-devices device-id ...Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100n | Capacitor_SMD:C_0805_2012Metric | C7, C8, C11, C16, C18 |
| 4 | 1u | Capacitor_SMD:C_0805_2012Metric | C2, C3, C12, C13 |
| 3 | 10u | Capacitor_SMD:C_0805_2012Metric | C6, C9, C17 |
| 3 | 1k5 | Resistor_SMD:R_0805_2012Metric | R2, R3, R4 |
| 2 | 100u/12V | Capacitor_SMD:CP_Elec_6.3x5.4 | C4, C19 |
| 2 | 1n | Capacitor_SMD:C_0805_2012Metric | C14, C15 |
| 2 | 470u/16V | Capacitor_SMD:CP_Elec_8x10 | C5, C10 |
| 2 | 600R | Inductor_SMD:L_0805_2012Metric | L1, L2 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R5 |
| 1 | 10R | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 30.9k 1% | Resistor_SMD:R_0805_2012Metric | R6 |
| 1 | 4.22k 1% | Resistor_SMD:R_0805_2012Metric | R7 |
| 1 | 470n | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 6.8uH | mb-a:L_Taiyo-Yuden_NR-60xx_HandSoldering | L3 |
| 1 | FR8205 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | I2C-6P | Connector_IDC:IDC-Header_2x03_P2.54mm_Vertical | X1 |
| 1 | Orange-Pi-Zero | device.farm:Orange-Pi-Zero | M1 |
| 1 | PAM8320 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | Power | device.farm:DG301-5.0-02 | J1 |
| 1 | Speaker | device.farm:DG301-5.0-02 | J2 |
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Questions
How big is the Mb a PCB?
It measures 39 × 57 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mb a use?
35 parts, built around the PAM8320RDR. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Mb a KiCad files?
From the burgrp/retradio repository on GitHub, at the commit this page was made from: the board is mb-a/board/mb-a.kicad_pcb and its schematic buttons/board/buttons.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mb a design in my own project?
Its repository states no licence, so its author keeps all rights: ask burgrp before reusing the design.